diff --git a/plat/diameter/makefile b/plat/diameter/makefile
index d3195c7..4bcd67f 100644
--- a/plat/diameter/makefile
+++ b/plat/diameter/makefile
@@ -27,3 +27,4 @@ $(OBJS):%.o:%.c
 	
 clean:
 	rm -rf $(OBJS) $(TGT)
+	rm -rf $(TOPDIR)/lib/libdiameter.a